Abstract: Abstract：Carbonate precipitation based on soil improvement is an environmentally friendly ground treatment technology that emerges in geotechnical engineering in recent years. This technique utilizes the urease-producing bacteria (termed as Microbially
Induced Calcite Precipitation, MICP) or urease enzyme (named Enzyme Induced Carbonate Precipitation, EICP) to hydrolyse urea
and induce the precipitation of cementing calcium carbonate, which can bond loose soil particles together and thus enhance soil
strength. Compared with the MICP method, the EICP method is free from issues related to bio-safety and oxygen availability, and
can be used to treat soils with finer particles. Therefore, the EICP method is promising for applications in practical engineering.
This study presents a review on the enzyme-induced carbonate precipitation based on soil stabilization from the aspects of type
and sources of urease enzyme, soil treatment methods with the EICP approach, and the strength enhancement of EICP treated soil.

Key words: soil improvement, induced carbonate precipitation, urease-producing bacteria, urease enzyme, urea hydrolysis